Motor lift dumping body



Nov. 3, 1931. A. P. LEE

MOTOR LIFT DUMPING BODY 3 Sheets-Sheet 1 Filed May 28, 1928 Nov 3, 1931. A. P. LEE 1,830,608

MOTOR LIFT DUMPING BODY Filed May 28, 1928 3 Sheets-Sheet 2 Q E35] M o o Nov. 3, 1931. k A. P. LEE 1,830,603

MOTOR LIFT DUMPING BODY Filed May 28, 1928 3 Sheets-She'et 3 Patented Nov. 3, 1931 STATE-S 1 ALBERT r. or PLYMOUTH, mnmm, 32AM, 0.1" rut 1011121 INDIANA, 1A concession or rumors mins assmnoano rnArLEaa Bon wooi/rfMOTOR IFI FTZ DUMPINGIBQDY Application file'd May 28,

invention relates to dumping bodies foritrucks and the like and has jfor its par- :ticularobject to provide a device ofthis character which can be readilyattached-to .thetnuek chassis ,Without in any Way moditying the same and which can be connected "to a-power take ofi of the motor of the truck :and operated by thecontinuous rotation of the power take ofl' inthe same pedirection to both move thev dumping body to dumping flposition andjto .returnit toa position of rest.

Another object of this invention istopro- ,vide ,a devicerof this character wherein, all

not :the dun pingmechanis n including, the "pivots at the-rear; of the dump-body gare supported and assembled upon an auXil1ary ira nework independentofthe chassis of the vehicle uponwhich the device is tobe used .and ;xvhicl1 vmay be attached tothe vehicle by simply connecting the auxiliary ,frame to'the chassisof vehicle.

I In carrying out my invention any suitable type ofpoWer take as maybe used although I prefer. to :USG- a single-speed vnon-eremrsible type controlledfrom a lever .at the drivers seat. 7

. The hoisting orHdumping mechanism auti- .lized for [dumping the. body consists ota worm and gear connection between-,the power stakev ofi @shaft and the train of gears which I sareinturn connectedby means ofgcrank arms :to the rear supporting arms which are -.cardried by an .auxiliary frame.

, lA-tigain of gears is constructed in such a nanner and so connected to, the dumping body .as {to give 1 the maximum lifting power .at the tinrelthe dumping. body is started from its resting position ,on "the truck toward ,cluniping position and at the-time the body starts onits return froin dumping position .tolnormal resting position. The purpose of this is to obtain a {slow positive movement at both ends of the dumping action where the .strainis. the greatest to eliminate the possi- 'bilityot undue shock or strain upon the hoist- .in mechanism from theipower take off.

a Other and nore specificiobjectsand advantagesbfthe invention-Will appear asthe .de-

scription proceeds inconnection withlthe ac-V Vcompanying. drawings. 1 However, t 1s to be 1 928.: 7 Seria1:-No. 2231;268.

[distinctlyqu nderstood that IwdO snot: intend =0neskilledin this artqand as stall-Within: the

scope Ofhh laim e lintthedm ing v v 'Fig. ;liS a side'vi-ewpartly inseotion-of my i-mproved device; e

Fig-i i sa p an Vi w:iillustrating-the;train o ,pge r eand the au i iary 'trameworkgbthe l umpingi ody e ng cut away;;jand A v a 4 Fig; 8 is ia perspeotive view; illustratingth mounting ofithe dumping body :onithe auxiliary framework. v i I Refenring now irdetail tothej drawings, the si nneral 5 represents generally the "oha ssis or framework ;.of theve'hicle gto whiohthe chunping body isxto be attached. The jnunieral 6 is a power take ofi shaft which. is -,preterably to be controlled inithe rnanner above set g-fonth; that is by a lever located in the drivers comp a-rtment vof the truck. Secured npongthe chassis 5" by me ans offa; Series -LU )lOOltS Risen au ilia y f ame consisting :otthesteelchannels 8 a d. wh ha ebnaced together by means vof the. angle-bars l0 ,and 51,1 riveted, inposition totorni a rigid traine- MTQIJL ,illntormejdiate the-auxiliary frame channels and the {chassis got the wehile Qthere is placeda Wooden, str p 3a: un e neatheach channel sovthat; when the uboltsiaredrawn up tight, thiswooden piece 13a will serve to take 11p any vunevenness: in eitherithelchannel or chassis :frame. l

v The. auxll ary frameworkprovides a support for atrain-ot gears hich-Will now be therein a for the gear shafts ,are bolted on to.;the i channel beams 13 and 14. a

'lo-therear of. the angle bars 1-1 al -plurality of brackets-1Z,and'18iare secured to the channels 8 and {9 respectively as by riveting. and have their top portions extending over the not Braces 24 and 25 are riveted to the arms and 21 and extend toward each other between the arms and are connected together as by means of the channel beam 26 which is firmly riveted to them. Also adjacent the pivot points of the arms 20 and 21 anangle iron 27 connects the members 24and so 15 as to brace them at this point, I

r Brackets such as 29 and 30 on each of the members 24 and 25 form means by which the connecting rods 31' and32 may be pivotally connected to themembers 24 and 25. This connection is preferably made some distance below the body frame in order that the required throw or movement of the body may be obtained with the limited lengthwise movement of the connecting rods 31 and 32. The, forward sloping edges of the arms 20 and 21 have inwardly'turned flanges 33and 34 upon which are mounted the supporting brackets 35 and 36 which rest upon the rear -fiat portion 37 of the'angle iron 11 when the body is in loading or normal position. These brackets 35 and 36 serve to take the strain oif the shaft 19 to which the arms'20 and 21 are pivoted while the body is being loaded.

' The gear connection from the power take off shaft 6 will now be described.

This shaft connects with the worm shaft .38 which is journalledin the housing 39 and --may be filled with oil or other suitable lubricant and which carries a' worm 4O engaging a worm gear 41 also journalled in the housing member 39. The shaft of the worm gear 41 extends through the housing and is provided 011 the outside of the housing with a pinion 42 engaging a gear 43,-the shaft of which is journalled in' the bearing members 15 and 16 and carries at its opposite end a pinion 44. Pin,-

ion 44 meshes with gear 45, the shaft of which is also journalled in the bearing members 15 and '16, and carries between the members 15 and 16 a. pinion 46. Pinion 46 in turn engages driveg'ear'47 which has the pinions 48"and 49 on its shaft-and pinions 48 and 49 are geared to the large gears 50 and 51 respectively to whichflgears the connecting rods 31 and 32 are eccentrically connected. v

Nowwhen the shaft. 6 is rotated by means 'of'the power take oif deviceon the motor, the chain of gears will be driven and the connecting rods 31 and 32 will, during the initial movement from the position shown in Fig. 1, start the. body on its 'movement toward dumping position. -As is clear from Fig. 1, the initial rotation of the chain of gears causes verylittle rearward movement of the connecting rods'at first, but the rearward.

movement gradually increases during the first quarter rotation of the gears 50 and 51. Thus the maximum power is obtained at the time when the greatest force is necessary to move the dumping body toward dumping po- 7 sition. As this first movement is principally a'lifting movement of the load in the dumping body, this is highly essential in obtainingthebestresultsindumping. As thedumping body movesfromloading to dumping position, the speed gradually increases until the body is substantially half way between loading position and the extreme dump- .ing position." Atthis time since the arms 20 and 2 1 are mounted somewhat forward at the rear of'the dumping body, the center of gravity of the load has been lifted to the rear 3. suflicient' amount that the further movement requires much lessforce. As thebody' then moves into extreme dumping position as '85 shown in Fig. 3, the rearward movement of the connecting rods 31 and 32 gradually decreases in speed and this serves as a brake to prevent too sudden dumping of the load. The chain of gears effectively prevents the'9'0 tendency of the load to cause a high speed of rotation.

As the shaft 6 continues to rotate the gears 50 and 51 through the. chain of iconnecting gears, the body will be returned from dump- 'ing position gradually at first and then at a V Also, the useof this train of gears in this nannerand the suspension brackets at the rear upon which, the dumping body is pivoted permit the dumping body to be placed low down upon themain body so as to avoid excessive height while atthe same time all of, the advantages of the large dumping angle are maintained; This dumping structure is designed to have a maximum dumping angle of approximately forty five degrees to the horizontal which is sufficient to ,caus

proper dumping of the loads in the body.

" Atthe frontj end of the auxiliary frame the upstanding brackets 52 and 53 are adapted-to engage the framework 22 of the body and support the forward end thereof in loading position. 'From the above description it isthought the construction" and operation of this device will be clear to those skilled inthislart and having thus described m inventionwhat I claim as new and desire to secure by Letters' Patent is'z I I f I. A, dump body construction for vehicles 1 comprising an auxiliary framework adapted for mounting upon a vehicle chassis, a dumping body, brackets suspended from said framework adjacent the rear end thereof, supporting arms pivoted to said brackets at their lower ends and rigidly secured to said body, cooperating means on said arms and framework for relieving the pivotal connection between said arms and brackets of strain when said body is in loading position, longitudinally extending connecting links secured to said arms, and a train of gears carried by said framework and connected to said links whereby rotation of said gears continuously in one direction moves said body from loading position to dumping position and back to loading position. i

2. A dump body construction for vehicles comprising an auxiliary framework adapted for mounting upon a vehicle chassis, a dumping body, brackets suspended from said framework adjacent the rear end thereof, supporting arms pivoted to said brackets at their lower ends and rigidly secured to said body, bracing means connecting said arms, longitudinally extending connecting links secured to said means anda train of gears carried by said framework and connected to said links whereby rotation of said gears continuously in one direction moves said body from loading position to dumping position and back to loading position.

3. A dump body construction for vehicles comprising an auxiliary framework adapted for mountingupon a vehicle chassis, a dump ing body, brackets suspended from said framework adjacent the rear end thereof, supporting arms pivoted to said brackets at their lower ends and rigidly secured to said body, bracing means connecting said arms, longitudinally extending connecting links secured to said means, auxiliary sup-porting means on said arms and framework forwardly of the pivots of said arms, anda train of gears carried by said framework and connected to said links whereby rotation of said gears continuously in one direction moves said body from loading position to dumping position and back to loading position.

4. In a dumping vehicle, an auxiliary framework rigidly mounted on the vehicle chassis, a dumping body, arms supporting said body pivotally mounted on said auxiliary framework adjacent the rear end thereof, bracing means connecting said arms below said body, and means forswinging said body on its pivots comprising crank and gear means rotatably mounted on said framework 7 and a link connecting said means with said bracing means, said crank and gear means being rotatable in the same direction to dump said body and return the same to load carrying position.

5. A dumping body construction adapted to be mounted on a vehicle chassis without modifying the chassis, comprising a framework having means whereby the same may .be bolted down upon the chassis, a dumping body, brackets suspended from the rear end of said framework, supporting arms'on said dump body pivoted to said brackets at their lower ends, crank and gear means carried by said framework at its forward end, and a rigid link connecting said arms with said means, said framework and arms being provided with auxiliary supporting means forwardly of said brackets. V

6. A dumping body construction adapted to be mounted on a vehicle chassis without modifying the chassis, comprising a framework having means whereby the same maybe bolted down upon the chassis, a dumping body, brackets suspended from the rear end of said framework, supporting arms on said dump body pivoted to said brackets at their lower ends, a brace rigidly connecting said arms intermediate the body and the pivoted ends thereof, and body elevating and lowering means including a rigid link pivotally connected with said brace.

7. In a dumping truck the combination of a vehicle chassis, a dumping body, depending members connected with the dumping body, means supporting said members for movement at their lower ends upon the chassis so that the dumping body may be moved to dumping or loading positions, a cross brace construction between said depending members, and means for swinging said body upon the chassis including a link connected with said cross brace construction between said depending members.

In witness whereof, I hereunto subscribe my name this 22nd day of May, A. D. 1928.

ALBERT P. LEE. 

